The actress admits she has been "hyper-aware" of death since she was a young girl, when she began suffering from terrifying panic attacks.

She tells The Sunday Times' Style magazine, "I'm close to my mortality. I think about it every day. Not in a freaky way, but constantly. I feel hyper-aware that everything could end. That's always been in my mind, for whatever reason, since I was very small. ... I think I tend to worry more when things are good. I know those times will change."

However, Stone says she has made progress tackling her issues with the help of a therapist.

She adds, "You know, it ebbs and flows. It's nowhere near as bad as when I was a kid. ... I feel very comfortable talking about it. ... I was in therapy for two years as a kid. As someone with anxiety, you're constantly waiting for the next (attack). It's how my mind works. The reason I went into my job is because it gives you an outlet for all these emotions. My first-grade teacher put me in my first play because I had the jazz hands in me. A year later, I had my first panic attack. I mean, I had really, really bad anxiety as a kid, and improv was kind of my savior."